Nordic Folkboat
designed by Tord Sundén · 1942
modified long keelBermuda rigSweden
The Nordic Folkboat is a 25-foot bermuda rig sailboat designed by Tord Sundén, first launched in 1942.
General
| Builder | — |
|---|---|
| Designer | Tord Sundén |
| Years built | 1942 |
| Hull type | modified long keel |
| Rig type | Bermuda rig |
| Construction | — |
| Origin | Sweden |
Dimensions
| LOA | 25.20 ft7.68 m |
|---|---|
| LWL | 19.68 ft6.00 m |
| Beam | 7.22 ft2.20 m |
| Draft (max) | 3.92 ft1.19 m |
| Displacement | 4,255 lb1,930 kg |
| Ballast | 2,205 lb1,000 kg |
| Sail Area | 220 ft²20.4 m² |
Design ratios
Computed from the specs above using the standard formulas. Try the sailboat calculators with your own numbers.
SA / Displacement 13.41 Under-canvassed — heavy-air / motorsailing
Ballast / Displacement 51.8 % Higher = stiffer / more sail-carrying power
Displacement / Length 249 Moderate
Comfort Ratio 22.1 Coastal cruiser
Capsize Screening 1.78 Suited to offshore passages (≤ 2.0)
Hull Speed 5.9 kn Theoretical max displacement speed
How these numbers are calculated
- SA / Displacement
SA ÷ (Disp ÷ 64)^(2/3)— Power-to-weight. < 16 under-canvassed, 16–20 cruiser, > 20 racer.- Ballast / Displacement
Ballast ÷ Disp × 100— Stability/stiffness. Higher carries sail better.- Displacement / Length
Disp(lt) ÷ (0.01 · LWL)³— < 100 ultralight, 100–200 light, 200–300 moderate, > 300 heavy.- Comfort Ratio (Brewer)
Disp ÷ (0.65 · (0.7·LWL + 0.3·LOA) · Beam^1.33)— Motion in a seaway. Higher = more comfortable offshore.- Capsize Screening
Beam ÷ (Disp ÷ 64)^(1/3)— ≤ 2.0 favored for offshore; > 2.0 better for coastal use.- Hull Speed
1.34 · √LWL— Theoretical max displacement speed in knots.
Estimated price
$15,000 typical range $12,000 – $18,000
⚠ Rough estimate only — not market data. Derived from a simple model based on length and hull age; actual asking prices vary widely with condition, equipment, engine hours and location.
